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FE-modelling of cover splitting due to corrosion by use of inner softening band
Luleå tekniska universitet.
1999 (English)In: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 32, no 7, p. 486-491Article in journal (Refereed) Published
Abstract [en]

The splitting of concrete covers due to the expansive action of corrosion has been investigated by a finite element method (FEM) based on an element-embedded crack concept called the inner softening band. Fictive cross-sections, with and without transverse reinforcement, were studied. The concrete composition (plain and fibrous high-strength concrete) and the cover thickness were varied. The model produced credible fracturing behaviour in concrete covers and explained the mechanical origin of the cracks. For cover thicknesses less than two times the bar diameter, fibres do not seem to have any significant effect on occurrence of splitting cracks. However, fibres are effective to arrest the opening of arisen splitting cracks and to redistribute the strains to other cracks. Hence, fibres may postpone or prevent a total spalling of concrete covers. A larger cover is necessary not only to prolong the initiation period, but also for the fibres (2 volume-%) to be effective beyond occurrence of corrosion induced cover cracks.

Place, publisher, year, edition, pages
1999. Vol. 32, no 7, p. 486-491
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-11413DOI: 10.1007/BF02481632ISI: 000082480500003Local ID: a5eddf80-0a0f-11dd-ae49-000ea68e967bOAI: oai:DiVA.org:ltu-11413DiVA, id: diva2:984363
Note
Godkänd; 1999; 20080414 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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